{"id":54192,"date":"2018-03-09T22:41:52","date_gmt":"2018-03-09T22:41:52","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/coherent-control-of-charge-and-heat-transport-in-semiconductor-nanostructures\/"},"modified":"2018-03-09T22:41:52","modified_gmt":"2018-03-09T22:41:52","slug":"coherent-control-of-charge-and-heat-transport-in-semiconductor-nanostructures","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/coherent-control-of-charge-and-heat-transport-in-semiconductor-nanostructures\/","title":{"rendered":"Coherent control of charge and heat transport in semiconductor nanostructures"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Miguel Rey Maz\u00f3n <\/strong><\/h2>\n<p>Esta tesis considera algunos problemas relacionados con el transporte de carga y de calor en pozos y puntos cu\u00e1nticos dobles, construidos con heteroestructuras semiconductoras, en presencia de voltajes externos dependientes peri\u00f3dicamente del tiempo. Cuando el transporte tiene lugar de forma coherente, la interacci\u00f3n con potenciales o campos dependientes del tiempo modifica las propiedades de transmisi\u00f3n a trav\u00e9s de nanoestructuras semiconductoras. Por esta raz\u00f3n, hemos estudiado el comportamiento de la corriente continua en diferentes situaciones de inter\u00e9s.  en primer lugar se trata el efecto de control de la corriente el\u00e9ctrica. escogiendo los par\u00e1metros del voltaje aplicado, la interacci\u00f3n entre los pozos puede modificarse, llegando a anularse para determinados valores de la amplitud de voltaje y de la frecuencia de la oscilaci\u00f3n. El estudio de la supresi\u00f3n coherente de la corriente era conocida en sistemas aislados, pero su consideraci\u00f3n en problemas de transporte, donde el contacto con los electrodos debe incluirse expl\u00edcitamente, ha sido tenido en cuenta solo recientemente. Los resultados num\u00e9ricos han sido obtenidos mediante el formalismo de dispersi\u00f3n (scattering) de landauer, con las modificaciones adecuadas para tratar sistemas dependientes del tiempo. Para el c\u00e1lculo de las transmisiones se han utilizado matrices de transferencia (wagner, phys. Rev. A (1995) 51, 798) y el formalismo floquet-green (kohler, lehmann y h\u00ed\u00a4nggi, phys. Rep. (2005) 406, 379). Las primeras son una versi\u00f3n particular de la teor\u00eda de floquet en la que los estados asint\u00f3ticos de los electrones se toman como ondas planas. Los c\u00e1lculos realizados reproducen en el l\u00edmite de alta frecuencia los resultados de una aproximaci\u00f3n en el modelo de enlaces fuertes (tight-binding). Esta aproximaci\u00f3n ofrece interesantes resultados m\u00e1s f\u00e1ciles de analizar cualitativamente, puesto que convierten el problema inicial dependiente del tiempo en un<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Coherent control of charge and heat transport in semiconductor nanostructures<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Coherent control of charge and heat transport in semiconductor nanostructures <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Miguel Rey Maz\u00f3n <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 18\/07\/2006<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Fernando Sols Luc\u00eda<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Carlos Tejedor de paz <\/li>\n<li>liliana Arrachea (vocal)<\/li>\n<li> Rodr\u00edguez parrondo Juan  Manuel (vocal)<\/li>\n<li>sigmund Kohler (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Miguel Rey Maz\u00f3n Esta tesis considera algunos problemas relacionados con el transporte de carga y de calor [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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